Safety-lock for paper-cutting machines.



c. 'SEYBOLD.

SAFETY LOCK FQR PAPER CUTTING MACHINES.

APPLICATION FILED rBB.zo,'1911.

Patented Oct. s, 1912'.

ting machines,

- CHAIR-LES SEYBOLD,

OF DAYTON, OHIO.

SAFETY-LOCK FOR PAPER-CUTTING MACH INES.

Specification of'Letters Patent.

Patented Oct. 8, 1912.

Application filed February 20, 1911; Serial No. 609,869.

To all whom it may concern:

'Be,it known that 1, CHARLES SEYBOLD, a citizen of the'United States, and a resident of" the city of Dayton, in the county of .Montgomery and State of Ohio, have invented certain new and useful Improvemerits in Safety -Locks for Paper- Cutting Machines, .of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming .',a part of this specification. I

The object of my invention is to provide a positive and automatic lockior paper'cutsuch as'eare driven by power, in which, should the ordinary and usual power disconnecting device s fail to .operate for any reason and under which the movement of the knife and clamp is arrested at the end of each operation, the overthrow orreturn movement of the clamp and knife "shall be stopped and positively locked, and

at the same time when thus locked, it shall be impossible to throwin the driving power I by the starting lever, or otherwise, until the safety lockhas been released.

Heretofore it has been proposed to provide av locking bar or hook to engage the knife mechanism in the event that the disconnecting devices fail to operate;'but with such constructions, the rebound or reaction between'the locking lever and knife mechanism in many instances is sufficient to permit the starting lever to be actuated without the operator becoming aware that the mechanism has failed to operate properly;

' and in other instances, the full driving power of the machine can'be thrown on by the operator with the parts still in locked engagement, with the frequent danger of breaking and destroying some part of the mechanism. Y

It is the purpose of my invention to provide an automatic lock the operating parts, should the flywheel or driving pulleys fail to disconnect, or the friction brake. fail to operate, but which lock Sl.l.ll be so constructed and arranged that it shall be impossible to throw in the driving power with the starting lever, in the event that the safety lock has been brought into operation.

The invention consists of that certain novel construction and arrangement of arts to be hereinafter particularly pointe and thev starting lever are directlv connected,

lock, which shall not only actuated by the shaft 14, suitably out i d h b the afet* lock lever p and clalme w em y S l in the sliding grooved collar 16, mounted on so that when the locking device is in engagement with the operating mechanism it shall be impossible to Operate thestart-ing lever.

In the'drawings, Figure 1 is a front elevation of one side of a power driven paper cutting ,machine embodying my improveme'nts. Fig. 2 is a side elevation of the same. Fig. 3 is an enlarged front elevation of the safety lock lever, artly in section. Fig. 4 is a rear elevation of a portion of one of the supporting standards of the machine showing the lock lever in engagement with the end of the driving plate.

My invention is'applicable to any of the well known types of power driven paper cutting machines, and I have selected for illustration such parts of the paper cutting machine as may be necessary to show the application of my invention in the type of paper cutting machine illustrated in my Patent No. 511,972, of January 2, 1894.

1 is one of the side standards of such paper cutting machine; 2, a portion of one end of'the reciprocating knife bar; 3, a

portion of one end of the cam plate for actuating the knife bar; 4, one of the bars connecting the cam plate with the knife bar at one end, and 5, the cutting table. I

6 is the driving shaft provided with flywheel 7 and drivlng pullc 8, which parts are loosely mounted on tiedrivingshaft and arranged to be coupled. thereto in the starting of the machine by a suitable friction clutch construction indicated at 9. The driving shaft is suitably journaled in the side standards of the machine and carries the gear mechanism for actuating the driving plate 3., The driving shaft 6' is supported for its outer endin a supplemental standard 10, outside the driving pulley. The driving plate is reciprocated vertically in a diagonal direction by suitable gear mechanism not shown, and 11 is one of the diagonal slots in the cam. plate 3, which is .engaged by a roller 12 on the standard to guide the plate in its diagonal movement, V

the plate being suitably guided in a vertical direction in a vertical slot in the side standards. Y

The friction clutch 9, for throwing the driving power into and out of operation, is

journaled in side supports from the main frame, the arm 13 be ng rovided with a bifurcated end 15.engag1ng arm 13,'mounted on the of the shaft 19, so that the sh'aft 19 can be rocked on its longitudinal axis.

22 is a sleeve'splined on the shaft 19 so as to turn therewith, but adapted to slide lengthwise on the shaft, and normally held in contact with the inner bearing of the shaft 19 by. the coiled spring 23. The lower end of the starting lever 20 carries an arm 24, coupled by a link with a stud on the sleeve 22, and the sleeve 22 carries anup- -wardly' and inwardly extending arm 26,

provided with an adjustable stud 27 which is engaged by a projection or nose 28 on the bar-'3, when the cam bar and the knife bar are at the top of their throw, so that in this way the arm 26 is actuated to rock the shaft 19, and throw the intermeshing gear or'shaft 14 to shift the arm -13 to throw out the clutch mechanism of the driving shaft, and as long as the parts are in this position, it

will be evident thatthe operating lever cannot be operated to shift the clutch. mechanism-tothrow in the power. In or'der,there- .for e, to start the machine, ltlS necessary for the operator to first rotate the starting lever.'20 by the handle 29 on its longitudinalax'is, and this movement by reason of the arm 24 and link connection 25 draws the sleeve 22 ,toward the starting lever, compressing the coiled spring 23 and withdrawing the arm 26 from contact with the cam bar, so that-"as the sleeve 22 is held in this positiom'th'e operator ca rock-the shaft 19 to actuate the friction 'clu ch and couple the driving pulley with the' driving shaft. As

7 soon as the machine is started, and the starting lever 20 is released, the sleeve 22 returns to its normal position, and upon the completion of the upstroke of the cam bar, contactis made with the stud 27 on. the arm 26, and.

the shafts 19 and14 aij'e rocked to' throw out the clutch mechanism and disconnect the driving power. r

In order to insure agamstthe momentum of the machine conrmulng the operation after the driving power is disconnected, it

is usual to provide a hand brake on the driving shaft to prevent any overthrow. It sometimes happens that these brakes may not operate successfully either when freshly oiled or for other reasons, or the flywheel and "driving pulley may not disconnect from the driving shaft and it is in order to insur 'an'absolute and positive lock, for the operating mechanism in the event of such oa r41 failure of the parts to operate properly, that my invention is directed. To accomplish this result, I provide as follows: 30 is the lock lever pivoted on a stud or plate 31, near the bottom of the side standard on its side face. This lever is provided with a horizontal arm 32, which serves as a weight to hold the lever in vertical position. The upper end of the lock lever 30 is provided with a contact block 33, which is provided with a depending stud 34 seated in a socket 35 formed in the body of the lever lengthwise thereof. The stud 34 rests upon a coiled spring 36 which is located in the base of the socket, and the block 33 is held in position under the tensionof this spring by the transverse pin 37, on the stud which projects into the circular opening 38 in the upper-end of the lever. Theldiameter of this opening is suflicient toallow some play of the block under the tension of the coiled spring. The block 33 is provided with a beveled striking face 39 to conform to the under surface of 'the nose 28 on the cam plate 3, and the lock lever is so located-that when in normal position, this striking face of the blockjwill lie in the pathway of the travel of the nose 28 on the cam plate. Projecting from the front face of the lock lever, near its pivoted end,'is acone-shaped roller 40, suitably mounted on, a stud projecting from the face of the lever.

vided with a contact shoe 42 at its lower end. the -toe of which shoe normally stands in contact with this cone-shaped roller 40. When the rock shaft 14 is actuated, the shoe 42 bears against the, roller 40 and rocks the lock lever on its pivot 31. so as to withdraw the striking face 39'from its position under the nose 2 8 of the cam bar 3, and thus the machine may be operated inits normal way. In the. event, however, that, for any reason, the driving-bar may not be disconnected, or the hand brake fail to operate,

and the knife fail to stop at the conclusion of its upthrow, the cam plate will be caught by the lock lever 30, the coiled spring 36 acting as a bufl'er to prevent too great a jar. In the event that there should be any rebound between the lock lever and the nose on the cam plate, thecoiled spring 36 will cause the contact block 33 to follow and keep its bearing on the nose of the cam plate, so that in the event that the machine has not disconnected properly, and the knife has been caught by the. lock lever,-the

lock lever will continue in engagement with the nose on the cam plate, and inasmuch as the arm 41 will continue to bear uponthe projecting cone-shaped rolle'r' on the lock lever, it will be impossible to actuate the starting lever, and due and suflicient warning will. be giventhe operator, thatthere is some defect in the operating mechanism I Secured to the. rock shaft 14 is a depending'arm 41, proits shaft, operating with clutch mechanism for connecting the samewith the driving power, and a starting lever to operate said clutch, a separate lock lever normally lying in the pathway of the operating mechanism to lock said mechanism positively, with direct connection interniediate thestarting lever and the sep-' arate lock lever "to withdraw the lock lever underno'rm'al conditions upon the actuation normal with clutch; mechanism :lever normally lying i n: engagement upon operation, and to the parts. 4

of thestarting lever, and means to revent disengagemetof the loc lever when; the mechanism has been locked thereby. 2;. In a paper cutting'machine, a driving shaft, operatingmechanism for the 1 knife,

same with the driving power, and a starting lever to operate said clutch, a separate lock operating mechanism to lock said mechanism positively, with direct connectionfintermediate the starting lever and the separate lock the lock lever when not theactuation of the startinglever,"and to' prevent operation of the startinglever'when the lock lever is in engagement'with the operating mechanism, thelock leverv being provided with a spring buffer contact block,

take up'any rebound of lever to .withdraw er cutting machine, a driving 3.'In a pa- P for the knife,

shaft, operating mechanism with clutch'mechanism for connecting the same with the driving power, and a starting lever to operate said lock leverlying normally in'the pathway of theoperating mechanism to lock said mecha nism positively,

with an arm on the starting lever in contact with; the separa'te'lock lever 'to' withdraw the lock leVerL-under normal ,conditions upon the actuation ofthe starting lever, and "means to prevent normal disi'same with the drlving power,

-;operating mechanism engagement of the lock lever when the mechanism hasv been locked thereby.

' 4. In a paper cutting machine, a driving shaft, operating mechanism for the knife, with clutch mechanism for connecting the a'starting lever to operate said clutch, a separate lock lever. normally lying in'the pathwayof the for connecting the o in the pathway of the I of the operating mechanism mechanism positively, tion intermediate 'separate lock lever to" withdraw the lock 4 vlever when not in enga ement upon the ac operation'of. thestart ng. to prevent jars when clutch, a separate 1 p lever to prevent displacementof the contact 90 block While permitting movement thereof 5. In a paper cutt1ng'machine,-a driving shaft, operating mechanism tithe knife, with clutch mechanism for connecting the same with the. driving owerfa and a starting lever to operate sai clutch, aseparate lock lever-normally lying in to lock "said the starting lever and'the tuation of the 'startin Fever, and to prevent lever isin engagement with the operating mechanism, the lock disposed "n vertical position ,tndinal socketin the outerend thereof, and

a coiled s ring seated in said contact/h ing in said coiled spring, v

in on the stud engaging a recess in the lock under spring tension. CHARLES SEYBOLD.- Attestz-i I I FRANK H. HnRns'r,

O A. S'rUHLD EnEn.

lever when the lock.

lever when the lock to lock said mec'hathe pathway 1 with direct connec' lever. being normally-"t with a longisocket and a ock with a depending stud bear-- and a transverse 

